CN102353863A - Renewable energy source power generation synchronization test platform - Google Patents
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Abstract
The invention discloses a renewable energy source power generation synchronization test platform, an input module of which comprises a wind wheel (1), a power generator (2) and a photovoltaic battery board (3); an output module of the renewable energy source power generation synchronization test platform comprises a switching cabinet and a general synchronization test device; the switching cabinet is serially connected with a transformer (5) and an alternating-current variable-frequency power source (6) in the synchronization test device, and a power grid (7) to form a main circuit of the test platform; an impedance network consisting of a voltage-dividing unit (8) and a current-limiting unit (9) are connected in parallel to the main circuit, the voltage-dividing unit (8) is formed by serially connecting an impedance X1 with a switch K1, the a current-limiting unit (9) is formed by connecting an impedance X2 with a switch X2 in parallel; and a wind power generation system consisting of the wind wheel (1), the power generator (2) and a current limiter to be tested (41) which are connected serially and a photovoltaic power generation system which comprises the photovoltaic battery board (3) and an inverter (42) to be tested which are serially connected are connected with the switching cabinet and connected with the transformer (5) in the synchronization test device through switch switching. The renewable energy source power generation synchronization test platform can be used for testing a wind power converter and a photovoltaic inverter.
Description
Technical field
The present invention relates to a kind of proving installation of renewable energy power generation equipment.
Background technology
In recent years, be that master's the regenerative resource technology of generating electricity by way of merging two or more grid systems has worldwide obtained fast development with wind-power electricity generation and photovoltaic generation.By the end of the end of the year 2010, Chinese wind-force capacity of installed generator surpasses 40 gigawatts, and the photovoltaic generation installed capacity surpasses 1 gigawatt, has become one of renewable energy utilization big country that has material impact in the world.
For guaranteeing the safe and efficient of renewable energy power generation, before the generating set scene of being installed to, must carry out comprehensively test reliably to it.Yet fast-developingly with industry size incompatible be; China generates electricity by way of merging two or more grid systems in regenerative resource and lags behind to some extent aspect the equipment testing; The detection means and the detection platform of interfacing equipment (like current transformer, inverter) of particularly being incorporated into the power networks can not satisfy the industry development demand; To such an extent as to various product is very different on the market, be unfavorable for the sustainable and healthy development of industry.This just needs commercial or industrial analog electrical network source and the electric voltage dropping testing apparatus that is fit to wind-power electricity generation and photovoltaic power generation grid-connecting equipment.This cover testing apparatus should be able to be applicable to the grid disturbance signal testing and the low voltage ride-through capability test of high voltage, powerful wind power generating set or photovoltaic combining inverter; Should be able to simulate the physical characteristics of actual electric network; Can produce the drop-off voltage that falls the degree of depth and duration arbitrarily, the operating mode when truly accurately simulating the generation of electrical network transient state.
Numerous scholar both domestic and external and expert have carried out series of studies to the renewable energy power generation measuring technology that is incorporated into the power networks, and wherein: patent CN101846707A has proposed a kind ofly to realize the proving installation that wind-powered electricity generation unit low-voltage is passed through in low-pressure side; The distributed photovoltaic power supply combining inverter proving installation that patent CN201699430U proposes, analog electrical network source function wherein is output voltage fluctuation, frequency jitter and electrical network background harmonics; Patent CN101753086A has proposed a kind of fault traversing performance analog system of double-fed wind power generator, can be used for the double feedback electric engine low-voltage pass through, to the Performance Experiment such as support of light current net; Patent EP1876460A1 realizes that through the form of impedance dividing potential drop line voltage falls, and through selecting different switch combinations, can realize the form of various electric voltage droppings; Patent US5886429 has proposed the voltage fluctuation generation and the testing apparatus of a computer-controllable.People such as Zou Jianzhang have studied the comprehensive test platform of photovoltaic DC-to-AC converter through system emulation in paper " research of photovoltaic DC-to-AC converter test platform for comprehensive performance "; The people such as C.Wessels of Germany deliver " Transformer based voltage sag generator to perform LVRT and HVRT tests in the laboratory " one literary composition and propose the voltage falling generator based on the transformer form, and the low-voltage that can be used for laboratory miniwatt wind generator system is passed through with high voltage and passed through test; People such as the Dr.Yong Ho Chung of Korea S deliver " Voltage sag; Swell and flicker generator with series injected inverter " a civilian voltage falling generator that proposes based on series converter; This equipment can be tested the anti-line voltage perturbation of powerful device before actual field is installed, and this voltage falling generator can simulate the electrical network electric voltage dropping, jump and the situation of flickering.
Sum up both at home and abroad and can find about the current situation of wind-power electricity generation and photovoltaic power generation grid-connecting test; Problem such as various test platforms and the proving installation that is seen in report at present exists all that test function is single, analog capability is not enough, integrated level and automaticity are low can not satisfy the fast development of regenerative resource industry to quality detectability requirement.
Chinese patent CN101846707A comprises partial pressure unit, current limliting unit, control module, transformer, UPS, tested current transformer; Transformer, current limliting unit, UPS, current transformer are formed main circuit; Partial pressure unit is parallelly connected with main circuit, and control module is responsible for controlling the switch of main circuit, partial pressure unit, current limliting unit.Its function only can realize that the low-voltage of wind electric converter passes through test, is not suitable for photovoltaic DC-to-AC converter, can not simulate other physical characteristicss of electrical network.
Summary of the invention
The objective of the invention is to overcome that present renewable energy power generation is incorporated into the power networks that the proving installation test function is single, analog capability is not enough, problem such as integrated level and automaticity are low; Propose a kind ofly can possess simulation electrical network characteristic simultaneously: voltage, frequency, harmonic wave, flickering, three-phase imbalance, generation low-voltage are fallen fault condition; Not only can be used for the wind-electricity integration test but also can be used for the multifunctional universal grid-connection device test platform of grid-connected test, to remedy the generate electricity by way of merging two or more grid systems deficiency of detectability of present regenerative resource.
The renewable energy power generation that the present invention the proposes test platform that is incorporated into the power networks in conjunction with the functional characteristics that is incorporated into the power networks of wind power plant and photovoltaic generation equipment, has taken into full account the versatility and the convenience that install, can realize a plurality of test functions by a covering device.
The tested object of test platform of the present invention is current transformer and inverter.Described test platform comprises load module and output module; Wherein load module is made up of wind wheel, generator, 3 parts of photovoltaic battery panel; Wind wheel and generator convert wind energy into electric energy and input to tested current transformer, and photovoltaic battery panel converts sun power into electric energy and inputs to tested inverter; Output module is made up of switch cubicle and the general proving installation that is incorporated into the power networks; The proving installation that is incorporated into the power networks partly is made up of AC frequency conversion power supply, partial pressure unit, current limliting unit, transformer etc., for equipment under test provides the electrical network physical characteristics: the test condition that voltage, frequency, harmonic wave, voltage fluctuation, flicker, three-phase imbalance and low-voltage are fallen.
In the present invention; The wind generator system that wind wheel, generator, tested current transformer are composed in series links to each other with switch cubicle respectively with the photovoltaic generating system that photovoltaic battery panel, tested inverter are composed in series, through the switch in the switch cubicle switch to realize with the proving installation that is incorporated into the power networks in transformer be connected.Transformer, K switch 3, AC frequency conversion power supply, electrical network are composed in series the main circuit of the proving installation that is incorporated into the power networks; The impedance network that branch pressure voltage and current limliting unit are formed is connected in parallel in the two ends of AC frequency conversion power supply and the 3rd switch; First impedance and the series connection of first switch, second impedance and second switch parallel connection.
Generally speaking, this test platform has for equipment under test provides electrical network physical characteristics and low-voltage and falls fault two big functions, and according to the difference of equipment under test, the general proving installation that is incorporated into the power networks can provide different test conditions.When needing the voltage tester condition: the generate electricity by way of merging two or more grid systems principle different with photovoltaic according to wind-powered electricity generation, when the test wind electric converter, the voltage of the proving installation that is incorporated into the power networks output 690V ± 10%; When the test photovoltaic DC-to-AC converter, the voltage of the proving installation that is incorporated into the power networks output 400V ± 10%.When test conditions such as needs frequency, harmonic wave, voltage fluctuation, flicker, three-phase imbalance; The AC frequency conversion power supply is with the electric power signal of exportable National standard; Can be above any one independent signal, also can be the composite signal that comprises several kinds of signals.When the needs low-voltage is passed through test condition; The AC frequency conversion power supply will no longer be exported electric power signal; But only as control system; The switch on and off of control current limliting unit, partial pressure unit and main circuit and regulate impedance magnitude meets the electric voltage dropping of different test requests-keep-rejuvenation with generation.
The AC frequency conversion power supply both can have been exported the electric power signal of simulation electrical network physical characteristics as the core component of the general proving installation that is incorporated into the power networks, and also can be used as the control system of the whole proving installation that is incorporated into the power networks.
Description of drawings
Fig. 1 is the be incorporated into the power networks structural drawing of test platform of renewable energy power generation of the present invention;
Fig. 2 is the structural drawing of another kind of implementation of the present invention.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing and embodiment.
Test platform of the present invention comprises load module and output module; Wherein load module is made up of wind wheel 1, generator 2, photovoltaic battery panel 3; Wind wheel 1 converts wind energy into electric energy with generator 2 and inputs to tested current transformer 41, and photovoltaic battery panel 3 converts sun power into electric energy and inputs to tested inverter 42; Output module is made up of the switch cubicle and the proving installation that is incorporated into the power networks, and the proving installation that is incorporated into the power networks partly is made up of AC frequency conversion power supply 6, partial pressure unit 8, current limliting unit 9, transformer 5 etc.The wind generator system that described wind wheel 1, generator 2, tested current transformer 41 are composed in series links to each other with switch cubicle respectively with the photovoltaic generating system that photovoltaic battery panel 3, tested inverter 42 are composed in series, through the switch in the switch cubicle switch realize with the proving installation that is incorporated into the power networks in transformer be connected.Transformer, the 3rd K switch 3, AC frequency conversion power supply 6, electrical network 7 are composed in series the main circuit of the test platform that is incorporated into the power networks; The impedance network that branch pressure voltage and current limliting unit are formed is connected in parallel in the two ends of AC frequency conversion power supply and the 3rd K switch 3; The first impedance X1 and 1 series connection of first K switch, the second impedance X2 and second switch K2 parallel connection.
Fig. 1 has described the be incorporated into the power networks structure of test platform embodiment of renewable energy power generation of the present invention.As shown in Figure 1, this embodiment comprises load module, equipment under test and output module, and wherein load module is made up of wind wheel 1, generator 2, photovoltaic battery panel 3; Equipment under test 4 comprises current transformer 41 and inverter 42.Output module is made up of switch cubicle and the general proving installation that is incorporated into the power networks, and comprises A, B1, three joints of B2 in the switch cubicle, and the proving installation that is incorporated into the power networks is made up of AC frequency conversion power supply 6, partial pressure unit 8, current limliting unit 9, transformer 5.It is characterized in that: wind wheel 1 converts wind energy into electric energy with generator 2 and inputs to the current transformer 41 in the equipment under test 4; Photovoltaic battery panel 3 converts sun power into electric energy and inputs to the inverter 42 in the equipment under test 4; Equipment under test 4, switch cubicle, transformer 5, AC frequency conversion power supply 6 and electrical network 7 constitute the main circuit of test platform; Impedance network is formed in partial pressure unit 8, current limliting unit 9; Partial pressure unit 8 is made up of the first impedance X1 and first K switch 1, and current limliting unit 9 is made up of the second impedance X2 and second switch K2.
Connected mode of the present invention is following: wind wheel 1, generator 2, current transformer 41 are composed in series wind generator system.Photovoltaic battery panel 3, inverter 42 are composed in series photovoltaic generating system.Described wind generator system links to each other with switch cubicle respectively with photovoltaic generating system, through the switch in the switch cubicle switch to realize with the proving installation that is incorporated into the power networks in transformer 5 be connected.Transformer 5, the 3rd K switch 3, AC frequency conversion power supply 6, electrical network 7 are composed in series the main circuit of the proving installation that is incorporated into the power networks, an end ground connection of partial pressure unit 8, and the other end is connected between transformer 5 and the 3rd K switch 3.One of current limliting unit 9 terminates between transformer 5 and the 3rd K switch 3, and the other end is connected between AC frequency conversion power supply 6 and the electrical network 7, the first impedance X1 and 1 series connection of first K switch, the second impedance X2 and second switch K2 parallel connection.
Below describe the course of work of the present invention: when switch cubicle center tap A was connected with joint B1, test platform was used for wind test electric converter 41; When switch cubicle center tap A was connected with joint B2, test platform was used to test photovoltaic DC-to-AC converter 42.AC frequency conversion power supply 6 both can have been exported the electric power signal of simulation electrical network physical characteristics as the core component of the general proving installation that is incorporated into the power networks, and also can be used as the control system of the whole proving installation that is incorporated into the power networks.When equipment under test 4 needs the voltage tester condition; Under the control of AC frequency conversion power supply 6; The 3rd K switch 3 closures; First K switch 1 is broken off with second switch K2, because wind electric converter the be incorporated into the power networks electric pressure requirement different with photovoltaic DC-to-AC converter, the proving installation that is incorporated into the power networks is exported the voltage of 690V ± 10% and 400V ± 10% respectively; When needing test conditions such as frequency, harmonic wave, voltage fluctuation, flicker, three-phase imbalance when equipment under test 4; The 3rd K switch 3 closures; First K switch 1 is broken off with second switch K2; The electric power signal of AC frequency conversion power supply 6 control transformers 5 output National standard can be above any one independent signal, also can be the composite signal that comprises several kinds of signals; When equipment under test 4 needs low-voltage to pass through test condition; Under the control of AC frequency conversion power supply 6; K3 breaks off, and partial pressure unit 8 is incorporated main circuit work into current limliting unit 9, through the break-make of controlling first K switch 1 and second switch K2 and the size of adjusting impedance X1, X2; The degree of depth and all adjustable electric voltage dropping of holding time-keep-rejuvenation are fallen in transformer 5 output, satisfy the wind electric converter test request different with photovoltaic DC-to-AC converter.
The be incorporated into the power networks another kind of topological structure of test platform of the renewable energy power generation that Fig. 2 designs for the present invention.Different with Fig. 1 is, the two dual low voltage transformers 5 of the transformer adopting of the general proving installation that is incorporated into the power networks, and the joint of current transformer 41 links to each other with a secondary of two dual low voltage transformers in the switch cubicle, and the joint of inverter 42 links to each other with another secondary of two dual low voltage transformers.AC frequency conversion power supply 6 is no longer exported different voltages with different, but exports identical voltage signal, realizes different voltages with different output, i.e. 690V ± 10% and 400V ± 10% through no-load voltage ratios different between two dual low voltage transformers 5 former limits and two secondary.
The renewable energy power generation of the present invention test platform that is incorporated into the power networks has taken into full account the requirement of being incorporated into the power networks of wind-power electricity generation and photovoltaic generation, can shared same set of device in the test of current transformer and inverter, so this platform has versatility.In addition, the AC frequency conversion power supply among the present invention can also serve as the control system of whole flat in the dissimilar electrical network simulating signals of output, improved the integrated level and the intelligent level of test platform.
Claims (3)
1. renewable energy power generation test platform that is incorporated into the power networks is characterized in that described test platform comprises load module and output module; Described load module is made up of wind wheel (1), generator (2), photovoltaic battery panel (3); Described equipment under test (4) comprises current transformer (41) and inverter (42); Described output module is made up of the switch cubicle and the proving installation that is incorporated into the power networks, and the proving installation that is incorporated into the power networks is made up of AC frequency conversion power supply (6), partial pressure unit (8), current limliting unit (9) and transformer (5); Described wind wheel (1) and generator (2) convert wind energy into electric energy, import said current transformer (41), and photovoltaic battery panel (3) converts sun power into electric energy, import described inverter (42); Transformer (5), the 3rd K switch 3, AC frequency conversion power supply (6) and electrical network (7) series connection constitute the main circuit of the proving installation that is incorporated into the power networks; The impedance network that partial pressure unit (8), current limliting unit (9) are formed is connected in parallel in the two ends of AC frequency conversion power supply and the 3rd switch, and partial pressure unit (8) is composed in series by the first impedance X1 and first K switch 1; Current limliting unit (9) is composed in parallel by the second impedance X2 and second switch K2; One end ground connection of partial pressure unit (8), the other end of partial pressure unit (8) are connected between transformer (5) and the 3rd K switch 3; One of current limliting unit (9) terminates between transformer (5) and the 3rd K switch 3, and the other end is connected between AC frequency conversion power supply (6) and the electrical network (7).
2. according to the described renewable energy power generation of claim 1 test platform that is incorporated into the power networks, it is characterized in that described test platform is when test, described wind wheel (1), generator (2) and described current transformer (41) are composed in series wind generator system; Described photovoltaic battery panel (3) and described inverter (42) are composed in series photovoltaic generating system; Described wind generator system links to each other with switch cubicle respectively with photovoltaic generating system, through the switch in the switch cubicle switch with the proving installation that is incorporated into the power networks in transformer (5) be connected.
3. according to claim 1 or claim 2 the renewable energy power generation test platform that is incorporated into the power networks; It is characterized in that; When equipment under test (4) needs the voltage tester condition; The 3rd K switch 3 closures under the control of AC frequency conversion power supply (6), first K switch 1, second switch K2 break off, and the proving installation that is incorporated into the power networks is exported the voltage of 690V ± 10% and 400V ± 10% respectively; When equipment under test (4) needs frequency, harmonic wave, voltage fluctuation, flicker, three-phase imbalance test condition; The 3rd K switch 3 closures; First K switch 1, second switch K2 break off, the electric power signal of AC frequency conversion power supply (6) control transformer (5) output National standard; When equipment under test (4) needs low-voltage to pass through test condition; Under the control of AC frequency conversion power supply (6); The 3rd K switch 3 is broken off, and partial pressure unit (8) and current limliting unit (9) are incorporated main circuit work into, through controlling first K switch 1, the break-make of second switch K2 and the size of regulating the first impedance X1, the second impedance X2; The degree of depth and all adjustable electric voltage dropping of holding time-keep-rejuvenation are fallen in transformer 5 output, satisfy wind electric converter (41) and the different test request of photovoltaic DC-to-AC converter (42).
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Cited By (10)
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| CN102830299A (en) * | 2012-08-02 | 2012-12-19 | 苏州万可顶钇电源有限公司 | Grid-connected inverter test device and inverter energy recharging simulated power grid test system |
| CN102916417A (en) * | 2012-10-22 | 2013-02-06 | 北京天诚同创电气有限公司 | Distributed arrangement structure of converter in tower for wind generating set |
| CN103064023A (en) * | 2012-12-26 | 2013-04-24 | 北京荣华恒信开关技术有限公司 | Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof |
| CN103926443A (en) * | 2013-01-16 | 2014-07-16 | 国家电网公司 | Voltage drop simulation test circuit and method |
| CN106124991A (en) * | 2016-07-25 | 2016-11-16 | 中机国际工程设计研究院有限责任公司 | Power supply, test system and method for testing for the test of motor load stray loss |
| CN106251747A (en) * | 2016-10-08 | 2016-12-21 | 国家电网公司 | A kind of power distribution network analog systems |
| CN107782999A (en) * | 2014-06-11 | 2018-03-09 | 钱珺佳 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN107942172A (en) * | 2017-12-01 | 2018-04-20 | 华北电力科学研究院有限责任公司 | The damping characteristic test system and method for wind turbine and flexible DC power transmission association system |
| CN114204594A (en) * | 2021-12-07 | 2022-03-18 | 阳光电源股份有限公司 | Grid-connected system and insulation impedance detection method |
| CN114295914A (en) * | 2021-12-30 | 2022-04-08 | 深圳市首航新能源股份有限公司 | Test verification method and test verification platform for grid-connected electronic equipment |
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| CN102830299A (en) * | 2012-08-02 | 2012-12-19 | 苏州万可顶钇电源有限公司 | Grid-connected inverter test device and inverter energy recharging simulated power grid test system |
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| CN102916417A (en) * | 2012-10-22 | 2013-02-06 | 北京天诚同创电气有限公司 | Distributed arrangement structure of converter in tower for wind generating set |
| CN103064023A (en) * | 2012-12-26 | 2013-04-24 | 北京荣华恒信开关技术有限公司 | Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof |
| CN103064023B (en) * | 2012-12-26 | 2015-10-14 | 北京荣华恒信开关技术有限公司 | For grid-connected proving installation and the method for testing thereof of wind-powered electricity generation and photovoltaic |
| CN103926443A (en) * | 2013-01-16 | 2014-07-16 | 国家电网公司 | Voltage drop simulation test circuit and method |
| CN107782999A (en) * | 2014-06-11 | 2018-03-09 | 钱珺佳 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN107991563A (en) * | 2014-06-11 | 2018-05-04 | 陈国栋 | Power supply and distribution, the wind light mutual complementing nature imitation experiment device of grid-connected experiment and method of work |
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| CN114204594A (en) * | 2021-12-07 | 2022-03-18 | 阳光电源股份有限公司 | Grid-connected system and insulation impedance detection method |
| CN114204594B (en) * | 2021-12-07 | 2024-05-14 | 阳光电源股份有限公司 | Grid-connected system and insulation resistance detection method |
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